Air brush



Nov. 13, 19.23.

` AIR BRUSH i Filed oct. 6. 1921 M m lflozolzl (FL, w 5 m \"-\\w-" en@ Q 5 a@ M WM; l

A TTORNEY.

APatented Nov. 13, 1923.

rra

BIRCHRD E. HOLTON, 0F LOS ANGELES, CALIFORNIA.

AIR BRUSH.

Application led October 6, 1921. Serial No. 505,733.v

vLos Angeles, in the county of 'Los Angeles and State of California, have invented new and useful Improvements in Air Brushes, of which the followiner is a specification.

This invention relates to an air brush and has certain novel improvements over my copending application, Serial No. j 465,310, filed April 28, 1921.

One of the specific improvements of this brush is to provide a settling chamber in which any foreignmatter will be deposited before the air carrying the .same passes into the nozzle. In ordinary nozzle ,construction the apertures are very fine and any foreign matter will easily clog up the holes and cause the device to become inoperative.

Another object is to providev means for easily cleaning the conduit leading into the settling chamber. A 'still further object is to provide a practical means for journaling the spray cap upon the stem of the nozzle so that after long use no appreciable wear will take place which would ordinarily allow the nozzle to become worn thereby causing the stream of liquid to be thrown in an uneven spray.

Other objects and advantages will be seen and theinvention readily understood from the following description of the accompanying drawings in which:

Fig. 1 is a longitudinal central section.

Figs. 2, 3 and 4 are transverse sections on the respective lines of Fig. 1.

My improved air spray, like my copending application, comprises substantially a body portion 1 with a longitudinal bore 2 and an air conduit 3 having a downwardly pro! jecting portion which communicates withany suitable source of air supply (not shown) and regulated as by a valve 4, hook 5 is positioned o n the upper side of the body so that the air brush may beconveniently hung up when not in use.

Positie ned on the forward end of the body portion is an intermediate member 54 into, which the liquid is passed and 'projecting' forwardly from this member is -an inner nozzle 8, upon which is rotatably mounted a nozzle cap 23a in which are air conduits communicating with external openings for causing either a fan or straight spray. AThe intermediate member 5a is suitably supported upon the body portion l which'has a forwardly projecting extension 6 being in axial alinement with a bore 2, the said intermediate member having anaxial bore 7 which has screw threaded engagement with. the extension 6. Projecting forwardly from the opposite end of the bore 7 is an inner nozzle 8 .which also has a bore in axial alinement with the bor2 and which terminates in a reduced `ope`nin is adapted to c ose.

, The needlevalve has a stem 10a extending rearwardly within the bore2 and -terminatc ing in 'a threaded end 10b andan enlarged portion 10c is formed'on the'valve stem intermediate its ends and is slidably mountedV within the forward end of the bore 2 so as to form a suitable support for the needle valve. Projecting rearwardly from the end 10b and having threaded engagement with the same is an enlarged portion 1`0d which has a stem 10e of reduced diameter projecting rearwardly therefrom. The portion 10 is slidably mounted within the 'bore 2 and a lock nut, 10g may be placed on the valve stem so as to lock the portion 10d in any desired position alone` the threaded porpion of the valve stem.v 'Tlie packing 11 which surrounds the valve stem between theenlarged portion 10c and the lock nut 10g can be tightened by shifting of-the portion 10 so as to prevent leakage past the valve stem.

The bore 2 terminates in an enlarged bore 12 in which is mounted a spring 12a having engagement at its forward end with the enlarged portion 10c1 and at its rear end with an adjusting nut 12?)l which has threaded engagement with the bore 12. The stem 10 projects through and is slidably supported in thc nut 12b and-lock nuts 12c are position'ed on the rear end of the stem and spaced Vfrom'the nut 12b when in normal position so that a thrust ,collarl 15a may bek Nable mannerM and having a pivot point 14 to which a connecting link 15 is fastened, said link adapted to actuate the stem 10, through 9 which a` needle valve 10` the collar 15a and the air valve stem 16 slidablypengages the valve lever 13 so' that the valves will be opened simultaneously. A spring 17 may be positioned behind the valve 4 so as to normally keep the valves closed.

The settling chamber is formed within Elm the intermediate member as by having an annular recess 18 formed in the end adjacent the forward end oi' the body portion and the wall of this recess forms a peripheral flange 19 adapted to engage the periphery ot the bod Tlie inlet conduit 3 communicates with the lower portion of the chamber 2O formed by the recess and outlet conduits 21 lead to a tapered distributing chamber 22 formed by having a tapered extension 22 projecting forwardly from the end ot' the intermediate memberQ' The cap 23a that is rotatably mounted upon the inner nozzleS comprises substantially-a straight portion with an annular recess 24 formed therein adjacent the distributing chai'nber 22, and a radial ring 25 is formed on the straight portion after a look nut 23 is -placed `upon the-cap. This ring can be soldered or pressed on in any suitable manner.

The end of the nozzle cap 23a has a tapered surface adapted to be seated upon the taperingportion 22 and a central. portion of the member has rotatable engagement with the inner nozzle 8 by a straight cylindrical ground joint 27, forming a journal. An opening 28 leads from thc distributing chamber 22 to the annular recess 24 and conduits 29 lead from this rec'ess to a point near the end lof the inner nozzle where there is an auxiliary chamber 80, fromwhich air can be selectively distributed through either of the fan spray nozzles 81, whenever it is desired to use the latter.

The fan spray nozzles positioned at the sides of the central or straight spray opening in nozzle cap 2B comprise substantiallyv laterally extendirm` conduits 40 having communication with the conduits 29 through the auxiliary chamber 30 and with conduits 39, which extend across the conduits 40. The forward end of t-he conduits 39 terminates in outlets 41 which are adapted to be independently opened or closed as by needle valves 42 which have threaded engagement with the conduits 39 so that when'the valve stem 42 is removed, a straight passage way with open ends will be formed which will enable the operator to readily clean the saine as by a wire without. having to torce the wire around angles, as is necessary in the usual constructiono'f nozzles. lt is thus seen that it it is desired to sprayY an under surface such as the underside of the eaves oi a house, it is only necessary to close the upper needle valve and if it is desired to rotate the spray without rotation oi the handle, the lock nut 23 may be slightly loosened which will permit rotation of the cap.

As is seen, the conduits 21 being on the upper side of the intermediate member, means are. provided for evenly distrilnitingr the air from the distributing chamber through the conduits 29 and such means La7/asas comprises substantially an enlarged portion formed upon the inner nozzle 8 just 'forward of the central opening;- in the distributin;- chamber and this venlarged portion is shown in F 3 as a hexagonal surface, the corners oi' which, are in alinement with the edges of the opening and it has been found by such a construction that the air is evenly distributed.

ln the operation, and whether or not either oi the :tan spray nozzles 31 be used, the liquid to be distributed will enter the'conduit 33 and when the valves are open, air

-`fvill How through the settling` chamber 22,

conduits 21, distributing` chamber, conduits 29, and to the central distributing opening in the nozzle cap 23a, so as to evenly spread the liquid .flowing through the opening 9 in the inner nozzle 8, the 1iow of this liquidA to be optionally acted upon by the fan nozzles, and being; variable, as described by means of the valve 10. After a period o use it will be necessary to clean the settling chamber and such means are provided by haring a rod 34C passing; upwardly through a handle 35 and screw threaded into the end of the downwardly projecting port-ion of the conduit 3. The body portion has a downwardl projecting,` portion 36 adapted to engage t 1e upward portion ot' the handle so as to prevent rotation of the sanieupon the rod 34 and it will thus be seen that when the rod is removed, the handle can be removed and a wire thus forced up through the conduit so as to successfully clean it and the settling chamber.

Various changes may be made in the details of construction by those skilled in the ant. without departing -from thespirit ot' my invention as set torth in the appended claims.

What is claimed is:

l. in air brush comprising a nozzle cap havingv a central distributirm opening` a settling chamber having, an inlet conduit leading into the lower portion of said chamber and an outlet conduit leading"r from the upper portion of said chamber and com- .niunicating with said opening in said nozzle.

2. An air brush comprising an intermedi ate member having' a tapered portion and ai inner nozzle havin; a straight portion`v a nozzle cap rotatably journaled on ysaid straight portion and seated on said tapered portion., said cap having conduits communi catino with an air supply.

3. An air brush comprising a body portion, an iuterniediatc nicnibcr projecting for.- wardly troni said portion, a. conduit in said bod) portion communieating with a chamn bei' in said intermediate portion, a handle, a rod passingr through said handle and detach-ably fastened in the end ot said'conduit, so that said conduit will be accessible'r by the detachment of said rod.

4. An air brush comprising a body member, an intermediate member having a taperi'iig extensioniwith a. central opening projecting forwardly from said member, an inner nozzle projecting y forwardly from said intermediate member through said opening, a passageway formed between said inner nozzle and the walls of said opening, said inner nozzle having a distributing enlargement positioned in front of said passageway.

5. An air brush comprising a b'ody pory tion, a reduced axial extension projecting forwardly from said portion, an intermediate member with an axial bore having screw threaded engagement with said extension, there being an annular recess in one end of said member adjacent said body portion, said recess forming a settling chamber, a conduit leading into said chamber, and a conduit leading from said chamber through said member to a nozzle.

6. An air brush comprising a body por tion, a reduced axial extension projecting forwardly `from said portion, an intermediate member with an axial bore having screw threaded engagement with said extension, an annular recess in one end of said member surrounded by a peripheral liange, said iange engaging said body portion and forming aii annular settling chamber around said extension. an inner nozzleprojecting for wai'dl'y troni the opposite end of said bore. a

,tapering extension projecting forwardly l'iom the corresponding end of said member` said taperingr extension forming a distributing chamber with a central' opening, a conduit leading from 'the upper portion of said annular settling chamber to said distributing chamber. said inner nozzle projecting t'orwardly through said central opening, a passageway trom said distributing chamber along the outside of said inner nozzle, a disiributinglenlargementformed on said inner nozzle in Jfront of said passageway, and a nozzle cap rotatably journaled outside of said inner nozzle and seated upon said tapering extension.

T. An air brush having a nozzle-cap provided with a straight spiay opening and fan spray nozzles supported at the sides of said straight spray opening` said fan spray nozzlel comprising lateral extending conduits communicating with conduits to said straight Spray opening. straight secondary condults extending across said lateral conduits, outlets on the forward end of said secondary conduits` removable needleyalves in said secondary conduits for independently closing or opening said outlets, said valves when removed from said conduits adapted to leave a straight passageway with free open ends.

8. An airbrush having a straight spray opening and fan spray nozzles supported at the sides thereof, said spray nozzle compris- ,ing angiilarlydisposed straight conduits said nozzles, said valves when removed from said conduits adapted to leave a straight passageway with free open ends.

9. An air brush having a straight spray opening in a nozzle cap, fan spray nozzles supported by said nozzle cap, said nozzles fed from common conduits, and means for independently closing or opening any one ot' said tan spray nozzles.

v10. An air brush having a straight spray opening lin a nozzle cap, tan spray nozzles supported' by said nozzle cap, said nozzles fed from common conduits, means for independently closingv or opening any one of said fan spray nozzles, Aind means for varying the fiow of liquid said fan nozzles.

11. An air-brush comprising a body portion. a straight inner nozzle supported by said body, a t'an spray, means carried by a nozzle cap journaled on said inner nozzle, and means whereby said cap may be rotated independently of said body portion so as to rotate the spray.

12. An vair brush comprising a body portion, a straight inner nozzle supported by said body, a fan spray, meanscarried by a nozzle cap journaled on said inner nozzle, means whereby said cap may be rotated independently of said body portion so as to rotate the spray with said attachment, and means for positively lockingsaid cap in any position.

18. An air brush comprising a nozzle, and settling means within said air brush for separating foreign matter from the air before` the same passes through said nozzle.

In testimony whereof Iliave signed vmy naine to this specification.

BIRCHARD E. iiaon'fioi-I.l

i be acted upon by 

